Fildena 50: Purple Pill To Maintain Erection https://www.medypharmacy.com/product/fildena-50/ Fildena 50 is a drug used to treat men who are unable to achieve erection during sexual intercourse. This pill helps fight erectile dysfunction. This pill increases blood flow to the penis. The effect of this pill of Fildena 50 lasts for about 4 to 5 hours. Alcohol should not be served while taking this medicine.